基于模型参考自适应方法的随动系统参数辨识  

Parameters Identification of Servo System Based on Model Reference Adaptive Control

作　　者：占昌恒 潘军[1] 王歌 宋鹏 韦祖拔 ZHAN Changheng;PAN Jun;WANG Ge;SONG Peng;WEI Zuba(Northwest Institute of Mechanical&Electrical Engineering,Xianyang 712099,Shaanxi,China)

机构地区：[1]西北机电工程研究所,陕西咸阳712099

出　　处：《火炮发射与控制学报》2018年第1期34-38,共5页Journal of Gun Launch & Control

摘　　要：火炮在调转过程中,系统转动惯量会发生变化,从而引起折算到随动系统电机轴上的转动惯量发生变化,影响随动系统控制性能,若不根据系统转动惯量参数调整控制参数,严重时会破坏系统稳定性,导致无法完成调炮任务。为实时获得系统参数,通过推导永磁同步电机在稳态条件下的数学模型,利用模型参考自适应法实现对折算到电机轴上的转动惯量的在线辨识,在MATLAB/Simulink中搭建模型进行分析和比较,仿真分析结果表明,模型参考自适应法简单有效,容易实现,准确性较高,能较好地实时辨识转动惯量的变化,具有一定的工程应用价值。When a gun is in the course of traversing,the system momentum of inertia(MOI)will change,which accordingly effects the change of the MOI converted to the motor shaft in the servo system and thus the control performance of the servo system.If control parameters are not adjusted according to system MOI parameters,system stability might be disturbed and the gun may fail to traverse in grim conditions.In order to obtain real-time system parameters,a mathematical model is established based on the permanent magnet synchronous motor in steady-state conditions.Online identification of the MOI on the shaft of the motor is then realized by means of Model Reference Adaptive Control(MRAC).Analysis and comparison are made to verify the model built through MATLAB/Simulink.It is proved that the method can identify the value of the MOI quickly and accurately online.The simulation analytical result demonstrates that MRAC is a simple,valid,attainable,and reliable way to identify real-time MOI changes,which has a measure of value in terms of engineering application.

关 键 词：随动系统 参数辨识 模型参考自适应 转动惯量 

分 类 号：TJ303.8[兵器科学与技术—火炮、自动武器与弹药工程]